Fatal/Service Errors
The following tables show fatal/service errors, which are not
continuable; no further operation of the printer will occur until
corrective action is taken.
LED Display
5P/5MP 6P/6MP
ERROR CODE Description and Recommendation
50 Fuser Malfunction
1. Remove power to the printer for 10
minutes. If this doesn’t clear the error:
2. Perform the Fuser Checks shown in Table
C-6.
3. Check the Fuses (FU101 and FU201) on
the DC Controller PCA. Replace if faulty.
3. Replace the DC Controller PCA.
Table 5. Fuser Malfunction
SUSPECTED CAUSE CHECK
1. Connector Contact Ensure that J103 and J204 connectors on the Fusing Assembly are seated
securely into the DC Controller PCA connectors (see Figure 6-29 in the
Combined Service Manual for locations). Reseat the Fusing Assembly.
2. Thermistor wire open. Remove the Fuser and measure the resistance between connectors J204-1
and J204-2 (see Figure 6-29 in the Combined Service Manual for location).
Resistance should read approximately 440 K Ohms at 20 Deg C (room
temperature). If the thermistor wire is open, replace the Fusing Assembly.
3. Thermal Fuse. Measure the continuity between connectors J103-1 and J103-2 on the Fuser
(see Figure 6-29, the Combined Service Manual for location). It should be
approximately 30
±
5 Ohms for 100-120 VAC or 127
±
5 Ohms for 220-245
VAC. If the thermal fuse is open, replace the Fusing Assembly.
Table 6. Fuser Checks
HP LaserJet 5P/5MP, 6P/6MP Printer Service Supplement
Troubleshooting
67
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